Ortrud Oellermann | |
---|---|
Born | Vryheid |
Awards | Silver British Association Medal Meiring Naude Medal, Hall Medal |
Academic background | |
Alma mater | University of Natal, Western Michigan University |
Thesis | Generalized Connectivity in Graphs |
Doctoral advisor | Gary Chartrand |
Academic work | |
Discipline | Mathematics |
Sub-discipline | graph theory |
Institutions | University of Durban-Westville, Western Michigan University, University of Natal, Brandon University, University of Winnipeg |
Notable works | Applied and Algorithmic Graph Theory |
Ortrud R. Oellermann is a South African mathematician specializing in graph theory. She is a professor of mathematics at the University of Winnipeg.
Oellermann was born in Vryheid. [1] She earned a bachelor's degree,cum laude honours,and a master's degree at the University of Natal in 1981,1982,and 1983 respectively, [2] as a student of Henda Swart. [3] She completed her Ph.D. in 1986 at Western Michigan University. Her dissertation was Generalized Connectivity in Graphs and was supervised by Gary Chartrand. [2] [4]
Oellermann taught at the University of Durban-Westville,Western Michigan University,University of Natal,and Brandon University,before moving to Winnipeg in 1996. At Winnipeg,she was co-chair of mathematics and statistics for 2011–2013. [2]
With Gary Chartrand,Oellermann is the author of the book Applied and Algorithmic Graph Theory (McGraw Hill,1993). [AA]
She is also the author of well-cited research publications on metric dimension of graphs [MD] ,on distance-based notions of convex hulls in graphs, [CS] and on highly irregular graphs in which every vertex has a neighborhood in which all degrees are distinct. [IG] The phrase "highly irregular" was a catchphrase of her co-author Yousef Alavi;because of this,Ronald Graham suggested that there should be a concept of highly irregular graphs,by analogy to the regular graphs,and Oellermann came up with the definition of these graphs. [5]
In 1991,Oellermann was the winner of the annual Silver British Association Medal of the Southern Africa Association for the Advancement of Science. [6] She won the Meiring Naude Medal of the Royal Society of South Africa in 1994. [7] She was also one of three winners of the Hall Medal of the Institute of Combinatorics and its Applications in 1994,the first year the medal was awarded. [8]
AA. | Chartrand, Gary; Oellermann, Ortrud R. (1993), Applied and Algorithmic Graph Theory, International Series in Pure and Applied Mathematics, New York: McGraw-Hill, Inc., ISBN 0-07-557101-3, MR 1211413 |
IG. | Alavi, Yousef; Chartrand, Gary; Chung, F. R. K.; Erdős, Paul; Graham, R. L.; Oellermann, Ortrud R. (1987), "Highly irregular graphs", Journal of Graph Theory , 11 (2): 235–249, doi:10.1002/jgt.3190110214, MR 0889356 |
MD. | Chartrand, Gary; Eroh, Linda; Johnson, Mark A.; Oellermann, Ortrud R. (2000), "Resolvability in graphs and the metric dimension of a graph" (PDF), Discrete Applied Mathematics , 105 (1–3): 99–113, doi: 10.1016/S0166-218X(00)00198-0 , MR 1780464 |
CS. | Cáceres, José; Márquez, Alberto; Oellermann, Ortrud R.; Luz Puertas, María (2005), "Rebuilding convex sets in graphs", Discrete Mathematics , 297 (1–3): 26–37, doi: 10.1016/j.disc.2005.03.020 , hdl: 11441/34391 , MR 2159429 |
Combinatorics is an area of mathematics primarily concerned with counting, both as a means and an end in obtaining results, and certain properties of finite structures. It is closely related to many other areas of mathematics and has many applications ranging from logic to statistical physics and from evolutionary biology to computer science.
Noga Alon is an Israeli mathematician and a professor of mathematics at Princeton University noted for his contributions to combinatorics and theoretical computer science, having authored hundreds of papers.
Cheryl Elisabeth Praeger is an Australian mathematician. Praeger received BSc (1969) and MSc degrees from the University of Queensland (1974), and a doctorate from the University of Oxford in 1973 under direction of Peter M. Neumann. She has published widely and has advised 27 PhD students. She is currently Emeritus Professor of Mathematics at the University of Western Australia. She is best known for her works in group theory, algebraic graph theory and combinatorial designs.
János Pach is a mathematician and computer scientist working in the fields of combinatorics and discrete and computational geometry.
Gary Theodore Chartrand is an American-born mathematician who specializes in graph theory. He is known for his textbooks on introductory graph theory and for the concept of a highly irregular graph.
Mehdi Behzad is an Iranian mathematician specializing in graph theory. He introduced his total coloring theory during his Ph.D. studies in 1965. Despite the active work during the last 50 years this conjecture remains as challenging as it is open. In fact, Behzad's conjecture now belongs to mathematics’ classic open problems.
In the mathematical field of graph theory, the Watkins snark is a snark with 50 vertices and 75 edges. It was discovered by John J. Watkins in 1989.
Ronald James Gould is an American mathematician specializing in combinatorics and graph theory. He is a Goodrich C. White professor emeritus in the Emory University Department of Mathematics.
Michael S. Jacobson is a mathematician, and Professor of Mathematical & Statistical Sciences in the Department of Mathematical & Statistical Science at the University of Colorado Denver. He served as Chair from 2003 to 2012 and was on loan serving as a program director in EHR/DUE at the National Science Foundation.
Michael David Plummer is a retired mathematics professor from Vanderbilt University. His field of work is in graph theory in which he has produced over a hundred papers and publications. He has also spoken at over a hundred and fifty guest lectures around the world.
In graph theory, a highly irregular graph is a graph in which, for every vertex, all neighbors of that vertex have distinct degrees.
Hendrika Cornelia Scott (Henda) SwartFRSSAf was a South African mathematician, a professor emeritus of mathematics at the University of KwaZulu-Natal and a professor at the University of Cape Town
Carolyn Ray Boone Mahoney is an American mathematician who served as president of Lincoln University of Missouri. Her research interests include combinatorics, graph theory, and matroids.
Zdeněk Dvořák is a Czech mathematician specializing in graph theory.
Catherine Greenhill is an Australian mathematician known for her research on random graphs, combinatorial enumeration and Markov chains. She is a professor of mathematics in the School of Mathematics and Statistics at the University of New South Wales, and an editor-in-chief of the Electronic Journal of Combinatorics.
Ermelinda DeLaViña is an American mathematician specializing in graph theory. She is a professor in the Computer and Mathematical Sciences Department of the University of Houston–Downtown, where she is also Associate Dean of the College of Science and Technology.
Ping Zhang is a mathematician specializing in graph theory. She is a professor of mathematics at Western Michigan University and the author of multiple textbooks on graph theory and mathematical proof.
Pamela Estephania Harris is a Mexican-American mathematician, educator and advocate for immigrants. She is currently an associate professor at the University of Wisconsin-Milwaukee in Milwaukee, Wisconsin, was formerly an associate professor at Williams College in Williamstown, Massachusetts and is co-founder of the online platform Lathisms. She is also an editor of the e-mentoring blog of the American Mathematical Society (AMS).
Mirka Miller was a Czech-Australian mathematician and computer scientist interested in graph theory and data security. She was a professor of electrical engineering and computer science at the University of Newcastle.
Christina Eubanks-Turner is a professor of mathematics in the Seaver College of Science and Engineering at Loyola Marymount University (LMU). Her academic areas of interest include graph theory, commutative algebra, mathematics education, and mathematical sciences diversification. She is also the Director of the Master's Program in Teaching Mathematics at LMU.
{{citation}}
: CS1 maint: multiple names: authors list (link)